The train known as "The Beast" passes by the Sagrada Familia shelter in Apizaco, Mexico. For many migrants, the train is the next step in their journey north. Alejandro Cegarra for NPR hide caption
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Albino Quiroz Sandoval is seen at age 10 (bottom right) with relatives including his parents and brother. Now in his 70s, he has been missing for more than a year. Alejandra Rajal for NPR hide caption
Last Year, A Retired Mexican Schoolteacher Vanished. His Family Still Seeks Answers
Diego Luna attends the Hollywood premiere of Rogue One: A Star Wars Story on Dec. 10, 2016. Luna lives in Mexico City and, as a political activist, he sees himself as someone who has a voice on both sides of the border. Charley Gallay/Getty Images for Disney hide caption
Actor Diego Luna On The 'Awakening' Around Mexico's Presidential Election
Venezuela Tries To Convince Investors That It's The Land Of Opportunity
Hillary Clinton (from left), Michelle Obama, Melania Trump, Rosalynn Carter and Laura Bush all have expressed their concern about migrant children being torn from parents at the Mexico border. AP hide caption
Backlash Grows Against Trump Policy Of Separating Families At The Border
Colombia's President-elect Ivan Duque celebrates his victory in the presidential runoff election, in Bogota, Colombia, Sunday. Duque defeated Gustavo Petro, a former leftist rebel and ex-Bogota mayor. Fernando Vergara/AP hide caption
A relative of one of the victims of the nightclub waits outside the morgue in Caracas on Saturday. Federico Parra/AFP/Getty Images hide caption
Students with homemade mortars stand guard behind makeshift shields and barricades Tuesday at the National University in Managua, which has been occupied by protesters for more than a month. Inti Ocon/AFP/Getty Images hide caption
Abortion rights activists celebrate Thurdsay outside the Argentine Congress in Buenos Aires, shortly after lawmakers in the country's lower chamber passed a bill legalizing abortion. The bill's chances look uncertain in the upper chamber, but that did little to dampen excitement among its supporters. Eeitan Abramovich/AFP/Getty Images hide caption
Andrés Manuel López Obrador, a veteran leftist, is running for president once again. Polls put his lead well into the double digits ahead of his nearest rival. Mexico's election is July 1. Hector Vivas/Getty Images hide caption
How Mexico's López Obrador Has Become The Man To Beat In His 3rd Run For President
Detained immigrant children line up in the cafeteria at the Karnes County Residential Center, in Texas. Eric Gay/AP hide caption
Trump Administration And Advocates Clash Over What's Next For Migrant Children
A couple watches boats pass the docks in Manaus, a city on the Amazon River. Pop-up restaurants like this line the docks to dish homemade Brazilian fare to ship travelers and crews. Catherine Osborn for NPR hide caption